4200 Series Transmitters
Instruction Manual
Form 5596
November 2006
26
49A7893 M / IL
APPLY LUBRICANT OR SEALANT
NOTES:
ON 4212, 4222, USE KEY 35 INSTEAD OF KEY 19 AT THE “
−
”FEEDTHROUGH POSITION,
OMIT KEY 10
1
1
1
68
Figure 12. Housing Assembly for Type 4210, 4215, or 4220 Transmitter with Position Switches
and for Type 4212 or 4222 Position Switches without Transmitter
Field Circuit Printed Wiring Board
Refer to figure 13 for component locations.
Removal:
1. Note the locations of the field wires then
disconnect the wires from TB1, TB2, and TB3 (if
they are all used).
2. Remove the three screws that hold the board in
place.
3. Grasp one of the components that protrudes from
the board and gently lift the board from the field
wiring compartment.
4. Place the board on an anti-static surface for
repair or replacement.
Replacement:
1. When the replacement board is ready, lower the
board into the transmitter compartment.
2. Insert and tighten the three screws and, install
the wiring connections that were removed.
3. The red and black power wires must be
connected to TB3 according to the transmitter type.
Pot/Bushing Assembly Replacement
WARNING
Refer to the Maintenance WARNING at
the beginning of this section.
CAUTION
Remove the wiring assembly or
assemblies connected between the
potentiometer and the transmitter
printed wiring board before removing
the pot/bushing assembly (key 3) from
the transmitter housing (key 1). Failure
to disconnect the wiring assembly(ies)
may result in damage to the wiring.
1. Remove power from the instrument.
2. Remove the covers (key 2, figure 12 or 14) from
the transmitter housing.
3. Note the location of the field wiring, and
disconnect the wiring from the field circuit printed
wiring board, or from the barrier strip (key 11,
figure 14), mounted in the field wiring compartment.
